gistfile1.js

dataQuery = {
    "query" : {
        "custom_filters_score" : {
            "query" : {
                "match" : { "_all" : query }
            },
            "filters" : [
                {
                    "filter" : { "term" : {"_type" : "ticket"} },
                    "boost" : 1.5
                }
            ]
        }
    },
    "facets" : {
        "project_id" : {
            "terms" : {
                "field" : "project_name",
                "size" : 10
            }
        }
    }
};
if (facet !== undefined) {
    console.log(dataQuery);
   dataQuery.query.custom_filters_score.filters.push({
        "filter" : { "term" : {"project_name" : facet} },
        "boost" : 10
   });
}